作家必须是他或她时代的见证者，必须见证世界的不公和苦难。
A writer must be a witness to his or her time, must bear witness to the injustices and the sufferings of the world.
能源需求与环境保护之间的平衡是我们这个时代的挑战。
最简单的事情可以是最深刻的。